root / drupal7 / sites / all / libraries / tcpdf-version / include / tcpdf_images.php @ 9d13637e
1 | 85ad3d82 | Assos Assos | <?php
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2 | //============================================================+
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3 | // File name : tcpdf_images.php
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4 | // Version : 1.0.001
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5 | // Begin : 2002-08-03
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6 | // Last Update : 2013-08-05
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7 | // Author : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
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8 | // License : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
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9 | // -------------------------------------------------------------------
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10 | // Copyright (C) 2002-2013 Nicola Asuni - Tecnick.com LTD
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11 | //
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12 | // This file is part of TCPDF software library.
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13 | //
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14 | // TCPDF is free software: you can redistribute it and/or modify it
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15 | // under the terms of the GNU Lesser General Public License as
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16 | // published by the Free Software Foundation, either version 3 of the
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17 | // License, or (at your option) any later version.
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18 | //
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19 | // TCPDF is distributed in the hope that it will be useful, but
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20 | // WITHOUT ANY WARRANTY; without even the implied warranty of
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21 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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22 | // See the GNU Lesser General Public License for more details.
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23 | //
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24 | // You should have received a copy of the License
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25 | // along with TCPDF. If not, see
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26 | // <http://www.tecnick.com/pagefiles/tcpdf/LICENSE.TXT>.
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27 | //
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28 | // See LICENSE.TXT file for more information.
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29 | // -------------------------------------------------------------------
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30 | //
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31 | // Description :
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32 | // Static image methods used by the TCPDF class.
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33 | //
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34 | //============================================================+
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35 | |||
36 | /**
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37 | * @file
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38 | * This is a PHP class that contains static image methods for the TCPDF class.<br>
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39 | * @package com.tecnick.tcpdf
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40 | * @author Nicola Asuni
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41 | * @version 1.0.001
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42 | */
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43 | |||
44 | /**
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45 | * @class TCPDF_IMAGES
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46 | * Static image methods used by the TCPDF class.
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47 | * @package com.tecnick.tcpdf
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48 | * @brief PHP class for generating PDF documents without requiring external extensions.
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49 | * @version 1.0.000
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50 | * @author Nicola Asuni - info@tecnick.com
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51 | */
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52 | class TCPDF_IMAGES { |
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53 | |||
54 | /**
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55 | * Array of hinheritable SVG properties.
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56 | * @since 5.0.000 (2010-05-02)
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57 | * @public static
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58 | */
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59 | public static $svginheritprop = array('clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cursor', 'direction', 'fill', 'fill-opacity', 'fill-rule', 'font', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'glyph-orientation-horizontal', 'glyph-orientation-vertical', 'image-rendering', 'kerning', 'letter-spacing', 'marker', 'marker-end', 'marker-mid', 'marker-start', 'pointer-events', 'shape-rendering', 'stroke', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke-width', 'text-anchor', 'text-rendering', 'visibility', 'word-spacing', 'writing-mode'); |
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60 | |||
61 | // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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62 | |||
63 | /**
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64 | * Return the image type given the file name or array returned by getimagesize() function.
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65 | * @param $imgfile (string) image file name
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66 | * @param $iminfo (array) array of image information returned by getimagesize() function.
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67 | * @return string image type
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68 | * @since 4.8.017 (2009-11-27)
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69 | * @public static
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70 | */
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71 | public static function getImageFileType($imgfile, $iminfo=array()) { |
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72 | $type = ''; |
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73 | if (isset($iminfo['mime']) AND !empty($iminfo['mime'])) { |
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74 | $mime = explode('/', $iminfo['mime']); |
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75 | if ((count($mime) > 1) AND ($mime[0] == 'image') AND (!empty($mime[1]))) { |
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76 | $type = strtolower(trim($mime[1])); |
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77 | } |
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78 | } |
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79 | if (empty($type)) { |
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80 | $fileinfo = pathinfo($imgfile); |
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81 | if (isset($fileinfo['extension']) AND (!TCPDF_STATIC::empty_string($fileinfo['extension']))) { |
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82 | $type = strtolower(trim($fileinfo['extension'])); |
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83 | } |
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84 | } |
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85 | if ($type == 'jpg') { |
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86 | $type = 'jpeg'; |
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87 | } |
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88 | return $type; |
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89 | } |
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90 | |||
91 | /**
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92 | * Set the transparency for the given GD image.
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93 | * @param $new_image (image) GD image object
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94 | * @param $image (image) GD image object.
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95 | * return GD image object.
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96 | * @since 4.9.016 (2010-04-20)
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97 | * @public static
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98 | */
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99 | public static function setGDImageTransparency($new_image, $image) { |
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100 | // transparency index
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101 | $tid = imagecolortransparent($image); |
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102 | // default transparency color
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103 | $tcol = array('red' => 255, 'green' => 255, 'blue' => 255); |
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104 | if ($tid >= 0) { |
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105 | // get the colors for the transparency index
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106 | $tcol = imagecolorsforindex($image, $tid); |
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107 | } |
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108 | $tid = imagecolorallocate($new_image, $tcol['red'], $tcol['green'], $tcol['blue']); |
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109 | imagefill($new_image, 0, 0, $tid); |
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110 | imagecolortransparent($new_image, $tid); |
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111 | return $new_image; |
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112 | } |
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113 | |||
114 | /**
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115 | * Convert the loaded image to a PNG and then return a structure for the PDF creator.
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116 | * This function requires GD library and write access to the directory defined on K_PATH_CACHE constant.
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117 | * @param $image (image) Image object.
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118 | * return image PNG image object.
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119 | * @since 4.9.016 (2010-04-20)
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120 | * @public static
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121 | */
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122 | public static function _toPNG($image) { |
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123 | // set temporary image file name
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124 | $tempname = TCPDF_STATIC::getObjFilename('png'); |
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125 | // turn off interlaced mode
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126 | imageinterlace($image, 0); |
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127 | // create temporary PNG image
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128 | imagepng($image, $tempname); |
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129 | // remove image from memory
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130 | imagedestroy($image);
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131 | // get PNG image data
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132 | $retvars = self::_parsepng($tempname); |
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133 | // tidy up by removing temporary image
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134 | unlink($tempname); |
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135 | return $retvars; |
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136 | } |
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137 | |||
138 | /**
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139 | * Convert the loaded image to a JPEG and then return a structure for the PDF creator.
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140 | * This function requires GD library and write access to the directory defined on K_PATH_CACHE constant.
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141 | * @param $image (image) Image object.
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142 | * @param $quality (int) JPEG quality.
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143 | * return image JPEG image object.
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144 | * @public static
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145 | */
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146 | public static function _toJPEG($image, $quality) { |
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147 | $tempname = TCPDF_STATIC::getObjFilename('jpg'); |
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148 | imagejpeg($image, $tempname, $quality); |
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149 | imagedestroy($image);
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150 | $retvars = self::_parsejpeg($tempname); |
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151 | // tidy up by removing temporary image
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152 | unlink($tempname); |
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153 | return $retvars; |
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154 | } |
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155 | |||
156 | /**
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157 | * Extract info from a JPEG file without using the GD library.
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158 | * @param $file (string) image file to parse
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159 | * @return array structure containing the image data
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160 | * @public static
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161 | */
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162 | public static function _parsejpeg($file) { |
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163 | $a = getimagesize($file); |
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164 | if (empty($a)) { |
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165 | //Missing or incorrect image file
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166 | return false; |
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167 | } |
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168 | if ($a[2] != 2) { |
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169 | // Not a JPEG file
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170 | return false; |
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171 | } |
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172 | // bits per pixel
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173 | $bpc = isset($a['bits']) ? intval($a['bits']) : 8; |
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174 | // number of image channels
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175 | if (!isset($a['channels'])) { |
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176 | $channels = 3; |
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177 | } else {
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178 | $channels = intval($a['channels']); |
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179 | } |
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180 | // default colour space
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181 | switch ($channels) { |
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182 | case 1: { |
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183 | $colspace = 'DeviceGray'; |
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184 | break;
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185 | } |
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186 | case 3: { |
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187 | $colspace = 'DeviceRGB'; |
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188 | break;
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189 | } |
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190 | case 4: { |
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191 | $colspace = 'DeviceCMYK'; |
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192 | break;
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193 | } |
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194 | default: {
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195 | $channels = 3; |
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196 | $colspace = 'DeviceRGB'; |
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197 | break;
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198 | } |
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199 | } |
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200 | // get file content
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201 | $data = file_get_contents($file); |
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202 | // check for embedded ICC profile
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203 | $icc = array(); |
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204 | $offset = 0; |
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205 | while (($pos = strpos($data, "ICC_PROFILE\0", $offset)) !== false) { |
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206 | // get ICC sequence length
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207 | $length = (TCPDF_STATIC::_getUSHORT($data, ($pos - 2)) - 16); |
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208 | // marker sequence number
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209 | $msn = max(1, ord($data[($pos + 12)])); |
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210 | // number of markers (total of APP2 used)
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211 | $nom = max(1, ord($data[($pos + 13)])); |
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212 | // get sequence segment
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213 | $icc[($msn - 1)] = substr($data, ($pos + 14), $length); |
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214 | // move forward to next sequence
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215 | $offset = ($pos + 14 + $length); |
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216 | } |
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217 | // order and compact ICC segments
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218 | if (count($icc) > 0) { |
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219 | ksort($icc); |
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220 | $icc = implode('', $icc); |
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221 | if ((ord($icc{36}) != 0x61) OR (ord($icc{37}) != 0x63) OR (ord($icc{38}) != 0x73) OR (ord($icc{39}) != 0x70)) { |
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222 | // invalid ICC profile
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223 | $icc = false; |
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224 | } |
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225 | } else {
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226 | $icc = false; |
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227 | } |
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228 | return array('w' => $a[0], 'h' => $a[1], 'ch' => $channels, 'icc' => $icc, 'cs' => $colspace, 'bpc' => $bpc, 'f' => 'DCTDecode', 'data' => $data); |
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229 | } |
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230 | |||
231 | /**
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232 | * Extract info from a PNG file without using the GD library.
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233 | * @param $file (string) image file to parse
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234 | * @return array structure containing the image data
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235 | * @public static
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236 | */
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237 | public static function _parsepng($file) { |
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238 | $f = fopen($file, 'rb'); |
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239 | if ($f === false) { |
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240 | // Can't open image file
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241 | return false; |
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242 | } |
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243 | //Check signature
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244 | if (fread($f, 8) != chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10)) { |
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245 | // Not a PNG file
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246 | return false; |
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247 | } |
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248 | //Read header chunk
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249 | fread($f, 4); |
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250 | if (fread($f, 4) != 'IHDR') { |
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251 | //Incorrect PNG file
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252 | return false; |
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253 | } |
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254 | $w = TCPDF_STATIC::_freadint($f); |
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255 | $h = TCPDF_STATIC::_freadint($f); |
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256 | $bpc = ord(fread($f, 1)); |
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257 | $ct = ord(fread($f, 1)); |
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258 | if ($ct == 0) { |
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259 | $colspace = 'DeviceGray'; |
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260 | } elseif ($ct == 2) { |
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261 | $colspace = 'DeviceRGB'; |
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262 | } elseif ($ct == 3) { |
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263 | $colspace = 'Indexed'; |
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264 | } else {
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265 | // alpha channel
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266 | fclose($f); |
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267 | return 'pngalpha'; |
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268 | } |
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269 | if (ord(fread($f, 1)) != 0) { |
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270 | // Unknown compression method
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271 | fclose($f); |
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272 | return false; |
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273 | } |
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274 | if (ord(fread($f, 1)) != 0) { |
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275 | // Unknown filter method
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276 | fclose($f); |
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277 | return false; |
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278 | } |
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279 | if (ord(fread($f, 1)) != 0) { |
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280 | // Interlacing not supported
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281 | fclose($f); |
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282 | return false; |
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283 | } |
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284 | fread($f, 4); |
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285 | $channels = ($ct == 2 ? 3 : 1); |
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286 | $parms = '/DecodeParms << /Predictor 15 /Colors '.$channels.' /BitsPerComponent '.$bpc.' /Columns '.$w.' >>'; |
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287 | //Scan chunks looking for palette, transparency and image data
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288 | $pal = ''; |
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289 | $trns = ''; |
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290 | $data = ''; |
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291 | $icc = false; |
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292 | do {
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293 | $n = TCPDF_STATIC::_freadint($f); |
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294 | $type = fread($f, 4); |
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295 | if ($type == 'PLTE') { |
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296 | // read palette
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297 | $pal = TCPDF_STATIC::rfread($f, $n); |
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298 | fread($f, 4); |
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299 | } elseif ($type == 'tRNS') { |
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300 | // read transparency info
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301 | $t = TCPDF_STATIC::rfread($f, $n); |
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302 | if ($ct == 0) { |
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303 | $trns = array(ord($t{1})); |
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304 | } elseif ($ct == 2) { |
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305 | $trns = array(ord($t{1}), ord($t{3}), ord($t{5})); |
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306 | } else {
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307 | $pos = strpos($t, chr(0)); |
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308 | if ($pos !== false) { |
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309 | $trns = array($pos); |
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310 | } |
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311 | } |
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312 | fread($f, 4); |
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313 | } elseif ($type == 'IDAT') { |
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314 | // read image data block
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315 | $data .= TCPDF_STATIC::rfread($f, $n); |
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316 | fread($f, 4); |
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317 | } elseif ($type == 'iCCP') { |
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318 | // skip profile name
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319 | $len = 0; |
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320 | while ((ord(fread($f, 1)) > 0) AND ($len < 80)) { |
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321 | ++$len;
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322 | } |
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323 | // skip null separator
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324 | fread($f, 1); |
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325 | // get compression method
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326 | if (ord(fread($f, 1)) != 0) { |
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327 | // Unknown filter method
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328 | fclose($f); |
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329 | return false; |
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330 | } |
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331 | // read ICC Color Profile
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332 | $icc = TCPDF_STATIC::rfread($f, ($n - $len - 2)); |
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333 | // decompress profile
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334 | $icc = gzuncompress($icc); |
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335 | fread($f, 4); |
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336 | } elseif ($type == 'IEND') { |
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337 | break;
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338 | } else {
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339 | TCPDF_STATIC::rfread($f, $n + 4); |
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340 | } |
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341 | } while ($n); |
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342 | if (($colspace == 'Indexed') AND (empty($pal))) { |
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343 | // Missing palette
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344 | fclose($f); |
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345 | return false; |
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346 | } |
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347 | fclose($f); |
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348 | return array('w' => $w, 'h' => $h, 'ch' => $channels, 'icc' => $icc, 'cs' => $colspace, 'bpc' => $bpc, 'f' => 'FlateDecode', 'parms' => $parms, 'pal' => $pal, 'trns' => $trns, 'data' => $data); |
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349 | } |
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350 | |||
351 | } // END OF TCPDF_IMAGES CLASS
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352 | |||
353 | //============================================================+
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354 | // END OF FILE
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355 | //============================================================+ |